Solubility Homework
In each of the following problems, circle the solute that will be more soluble in the
solvent listed. You may find it useful to draw the Lewis structures of the solvent
and solutes (where applicable).
1)
Solvent: water.
Solutes: lithium chloride or carbon tetrafluoride.
2)
Solvent: CS2.
Solutes: PF3 or BF3.
3)
Solvent: CH3OH.
Solutes: N2H4 or Si2H6.
4)
Solvent: water.
Solutes: nitrogen or sulfur difluoride.
5)
Solvent: H2S.
Solutes: sodium hydroxide or boron trichloride.
6)
Solvent: NF3.
Solutes: CF4 or SiOF2
7)
Solvent: HF.
Solutes: nitrogen trichloride or nitrogen triiodide.
8)
To make iced tea, the following steps are taken: First you add tea bags to
hot water until the water is medium brown. Ice cubes are then added to
chill the beverage to a drinkable temperature. If you wanted to make
sweet tea (tea with sugar), at what stage in this process would you add
the sugar to ensure maximum sweetness? Explain.
9)
Sugar cubes are not solid crystals of sugar; they are sugar crystals that
are compacted together into cube shapes. When sugar cubes are placed
in water, they fall apart into their individual crystals very quickly. Based on
what you know of solubility, why are sugar cubes made in this way?
10)
Carbon dioxide has a solubility of 1.45 g/L at 1.00 atm. If we increased
the partial pressure of carbon dioxide to 4.50 atm, what will be the new
solubility of carbon dioxide in water?